If there's one thing we've learned from last week's episode of Dexterit's that Dexter Morgan can't kill Trinity just yet. Dexter knows he has a lot to learn from Arthur Mitchell, who has been juggling suburban family life with serial killing and is doing a pretty good job at it for nearly three decades, so he continues playing Kyle Butler, the divorced family man who has found refuge under Arthur's fellowship. While this little setback may cost others their lives, it gives Dexter a fresh perspective on the rules that have kept Arthur a free man and thus, turning Trinity into some sort of mentor.

In the episode "Slack Tide," Dexter applies what he's learned from Arthur in order to free up his time.He keeps Astor and Cody distracted with new activities and finds himself enjoying a moment of tranquility until his plan backfires. But that's not the only thing that fails tonight.

When Miami Metro discovers a string of murders connected to a prominent photographer, Dexter sees an opportunity for a clean kill. However, his plans seem to be thwarted every step of the way now that Quinn has taken a renewed interest in Dexter's nightlife after realizing that Dexter might be hiding something.

The best part, though, is seeing Deb become an obstacle to Dexter as she attempts to pursue Trinity while gradually delving into her father's past.